  //This object handles the paging at visual level
  function NavigationButtonsViewModel() {
	NavigationButtonsViewModel.prototype.nextEnabled = ko.observable(false);
	NavigationButtonsViewModel.prototype.previousEnabled = ko.observable(false);
	NavigationButtonsViewModel.prototype.pageDescription= ko.observable("");
	
	NavigationButtonsViewModel.prototype.setNavigationButtonsAvailability = function(navigationButtonsModel){
	this.nextEnabled(navigationButtonsModel.nextEnabled);
	this.previousEnabled(navigationButtonsModel.previousEnabled);
	this.pageDescription(navigationButtonsModel.pageDescription);
	}
}